Air-regulating fire shield



Decf13, 1927. 1,652,322 R. s. PECK AIR REGULATING FIRE SHIELD Filed June2 1927 I N V EN TOR. R. .5. Pea/r.

w)/ E v A TTORNE Y.

Patented Dec, 13,1927.

' v mxmonngsranmingenoxpfor vrcxsnnne MISSISSIPPI i,niairmcuriamermrsnmrn.

plication to' the see box-' doorway ofi adore; .motifve boiler furnaceand'is an improvement of the sub'je'ct matter discliised in my co pendingiapplieation,

An object of the present inventionis:

"te proyide ian-improvedtype "a shield -capab'l of being utili zed toregulate -the quan f may of a-ir 'permitted' to pass =th rough the'upper portionof the doorway while the shield is'i11'operativezpositifonz i V Otherpurposes-, 'advantages and' char-216teristiie fatures -0'f the *invention will he 11mm readil'yj"unde1'stood' 3 from the following detailed 'deseripti on' andaeeompanyingmlraa seamc I Figure l'is a fra'gm'entary front'elevationalView of a fire box "equi ppecl with the im-' proved-shield p V Fi ure' 2is aniedge view of {the .shield as it wili appear w-h en adj usted' i to--admit a relatively small volume of air through the operative positionto give access to sub stantially the total area of the doorway;

Proceedinglnow to a more detailed discussion of the drawings 11designates a shield normally overlying the upper portion ofthe fire boxdoorway 12 and hinged at 18 to a supporting strip 14. This strip issuspended by a bracket 15 from the door guide16 of the furnacestructure. 1

As indicated by dotted lines 1n Figure 1," shield 11 is aperturedtoprovide a plurality of air passages 17 normally closed by a flap 18.This flap is hinged, at 19, to the, strip 14' and tends to lie flatagainst the outer surface of the shield. The central upper edge portionof the flap is slot-ted at 20 to permit the flap to be swung upwardlywithout interference by the bracket 16. An adjusting screw 21 isthreaded through the flap 18 to bear against the outer surface of theshield 11 so that by turning this screw the flap may be adjusted toor-from the shield to thereby control the quantity of air ad--mittedbetween the shield and flap for de- 1927; Serial Na -mm.-

livery 'to the-fire boxthrough the passages- 17. VV h'enit is'de'siredto passa large-volume' of air into thefl fire boxt-hrouglr the passages17" the flap 18- is swung upwardly and' secured in the position shown inFigure an eye 23 carried by the slide bar 15. 7

inoperative position togive free access *to the: upper portion ofthefire-box for repair or otl ierpurposes 1t lSSGCHlGd to the flap by meansof the hook 2icarried b'ythe flap and engage'ablein the-eye "25oftheshield-= and thefshield' and flap are then both swung upwardly tothe position'r showir in Figure at and retained: in such positionby-engagement of 'the hook 22with tlie:eye 23;f

Theshield-ll and flap 18 are normally suspended as shown in Figure: 1 Iwith 1 the flap I lying against the outer surface of the shield andclosing the air passages 1?.

no airadmitted: i into the' fire' box through the upper portion of "thedoor-way i 12. 2 When the flap is swung outwardly by the operation Inthis position: of; the parts there is little or. I

of" screw- 21 the air admitted beneath 'the vflap for delivery into thefire box through the passages 17 is caused to be distributed evenly-overthe bed of the firebythe arrangement of said passages. By regulating,through the medium'of screw 21, the clearance provided l'ietweenxtheflap 18 and the underlying shield'll the quantity of air deliveredthrough the passages 17 may be regulated between. minimum and maximumlimlts so as to insure, efficient combustion for varying conditions ofengine operation;

When the maximum quantity of air is to be delivered into thefire boxthrough the passages 17'the .fiap 18 isisecured in the position shown inFigure explained.

iBesides controlling admitted into the fire box through the upperportion of the doorway 12 it will be understood that the shieldstructure herein disclosed serves to protect the fireman from theintenseheat within the fire box without interfering with the delivery offuel into the fire box through the lowerportion of the doorway '12. Asshown to advantage in Figure 1 the shield 11 is spaced a sufficientdistance from the furnace structure to permit the doors 26 of the firebox to operate therebetw'een and the "doorway 12. It is thus apparentthat the shield structure is the quantity of air lit] the invention itwill be understood that vari ous changes in the construction,arrangement and combination of parts may be resorted to within the scopeand spirit of the invention as defined by the appended claims.

\Vhat I claim is: 1. A shield of the character described provided withair passages and means for controlling the quantity of air deliveredtherethrough. i

A shield of the character described comprising an apertured plate and anaperture closing flap hingedly connected thereto. 3. A shield of thecharacter described comprising a member adapted to be secured at theupper edge of a furnace doorway, an apertured plate hinged to saidmember to overlie the upper portion of the doorway and means forcontrolling admission of air through the apertured portion of the plate.i. A shield of the character described comprising an apertured plateadapted to overlie the upper portion of a furnace doorway, a flapnormally closing the apertured portion of the plate and means foradjusting the flap to regulate admission of air through the saidapertured portion of the plate.

5. A shield of the character described comprising an apertured plateprovided with means for hingedly suspending the same from a furnacestructure to overlie the upper portion of the fire box doorway, a flaphingedly connectedto the shield and normally serving to close theapertured portion of the platejmeans for adjusting the flap relativelyto the plate to regulate the quan tity of air admitted into the fire boxthrough the apertured portion of the plate; and

means for securing said flap in raised position to freely expose theapertured portion of the plate when a maximum amount of air is to beadmitted through said apertured portion of the plate for delivery to thefire box. a, a a,

6. A shield of the character described LBOD'IIJI'lSlIlg a plate havingapertures formed therein, a strip hingedly connected to one edge of saidplate, a flap hingedly connected to said strip and adapted to normallylie.

against one face of the plate and to close the aperturestherein, means,for securing said strip to a furnace structure to dispose the aperturedplate over the upper portion of the [ire box doorway, means fordetachably securing the apertured plate to the said flap and meanscarried by the fiap and enga eahle with complementary meanscarried y thefurnace to secure the flap in an upwardly swung position with referenceto the fire box doorway. i i

In testimony whereof I hereunto afiix my signature.

RAYMOND s'rARNER PEO K.

